isrstealer | e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a

General

Target

e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe
Size

341KB
MD5

68a94a193ca67af0944be8757486bd80
SHA1

6d5d05ff79f122901cbd4121b618571d1852dbd7
SHA256

e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a
SHA512

cfee74e3408b8dd913edc719f787e525d6303416801eeecc1bbf4c5aa51447246952ec79cdac7106e379dca3a209a2bdcda7c19bac22e3822509b11e48ae7130
SSDEEP

6144:Icaxda88spxIhnnwY9ZextcjXmFijjorrsRqEH+bNFbq1f+WvzP3O4yhu:Xa288EeRweZLXmFiPoMwrNxn8

Score

10^/10

isrstealer collection spyware stealer trojan upx

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 2 IoCs

resource	yara_rule
behavioral2/memory/1240-138-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer
behavioral2/memory/1240-140-0x0000000000400000-0x0000000000442000-memory.dmp	family_isrstealer

NirSoft MailPassView 2 IoCs

Password recovery tool for various email clients

resource	yara_rule
behavioral2/memory/1300-154-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView
behavioral2/memory/1300-155-0x0000000000400000-0x000000000041F000-memory.dmp	MailPassView

Nirsoft 2 IoCs

resource	yara_rule
behavioral2/memory/1300-154-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft
behavioral2/memory/1300-155-0x0000000000400000-0x000000000041F000-memory.dmp	Nirsoft

UPX packed file 8 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/memory/4416-144-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4416-146-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4416-147-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/4416-148-0x0000000000400000-0x0000000000453000-memory.dmp	upx
behavioral2/memory/1300-151-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1300-153-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1300-154-0x0000000000400000-0x000000000041F000-memory.dmp	upx
behavioral2/memory/1300-155-0x0000000000400000-0x000000000041F000-memory.dmp	upx

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 2448 set thread context of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 1240 set thread context of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 set thread context of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2448 wrote to memory of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 2448 wrote to memory of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 2448 wrote to memory of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 2448 wrote to memory of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 2448 wrote to memory of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 2448 wrote to memory of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 2448 wrote to memory of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 2448 wrote to memory of 1240	2448	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	83
PID 1240 wrote to memory of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 wrote to memory of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 wrote to memory of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 wrote to memory of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 wrote to memory of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 wrote to memory of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 wrote to memory of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 wrote to memory of 4416	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	84
PID 1240 wrote to memory of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90
PID 1240 wrote to memory of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90
PID 1240 wrote to memory of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90
PID 1240 wrote to memory of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90
PID 1240 wrote to memory of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90
PID 1240 wrote to memory of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90
PID 1240 wrote to memory of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90
PID 1240 wrote to memory of 1300	1240	e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe	90

C:\Users\Admin\AppData\Local\Temp\e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe
"C:\Users\Admin\AppData\Local\Temp\e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2448
- C:\Users\Admin\AppData\Local\Temp\e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe
  C:\Users\Admin\AppData\Local\Temp\e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe
  2⤵
  - Suspicious use of SetThreadContext
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1240
- - C:\Users\Admin\AppData\Local\Temp\e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\c6Wz785akB.ini"
    3⤵
    PID:4416
- - C:\Users\Admin\AppData\Local\Temp\e2583b3df9a994bc3e4fbeaf863dbe8788f53b5baf8cbbbc650c704fc023262a.exe
    /scomma "C:\Users\Admin\AppData\Local\Temp\7szTgRfSrn.ini"
    3⤵
    - Accesses Microsoft Outlook accounts
    PID:1300

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Credentials in Files

1

T1081

Discovery

Lateral Movement

Collection

Data from Local System

Email Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\c6Wz785akB.ini

Filesize
5B

MD5
d1ea279fb5559c020a1b4137dc4de237

SHA1
db6f8988af46b56216a6f0daf95ab8c9bdb57400

SHA256
fcdcc2c46896915a1c695d6231f0fee336a668531b7a3da46178c80362546dba

SHA512
720e9c284f0559015312df7fe977563e5e16f48d3506e51eb4016adf7971924d352f740b030aa3adc81b6f65fd1dba12df06d10fa6c115074e5097e7ee0f08b3

Download Submit
memory/1240-140-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1240-138-0x0000000000400000-0x0000000000442000-memory.dmp

Filesize
264KB

Download
memory/1300-155-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1300-151-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1300-154-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/1300-153-0x0000000000400000-0x000000000041F000-memory.dmp

Filesize
124KB

Download
memory/2448-136-0x0000000004C70000-0x0000000004C7A000-memory.dmp

Filesize
40KB

Download
memory/2448-135-0x0000000004D00000-0x0000000004D9C000-memory.dmp

Filesize
624KB

Download
memory/2448-134-0x0000000004BC0000-0x0000000004C52000-memory.dmp

Filesize
584KB

Download
memory/2448-132-0x00000000001D0000-0x000000000022C000-memory.dmp

Filesize
368KB

Download
memory/2448-133-0x0000000005090000-0x0000000005634000-memory.dmp

Filesize
5.6MB

Download
memory/4416-148-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4416-147-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4416-146-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download
memory/4416-144-0x0000000000400000-0x0000000000453000-memory.dmp

Filesize
332KB

Download

Analysis

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